NMAP – Scanner de Segurança

O NMAP é uma ferramenta de código aberto, utilizada para exploração de rede e auditoria de segurança. Ela foi desenvolvida para identificar as portas de serviço que estão abertas na máquina-alvo ou em um conjunto de máquinas.


O NMAP é uma ferramenta de código aberto, utilizada para exploração de rede e auditoria de segurança. Ela foi desenvolvida para identificar as portas de serviço que estão abertas na máquina-alvo ou em um conjunto de máquinas.

O objetivo deste experimento é utilizar a ferramenta NMAP para avaliar a segurança da rede e identificar os ativos de rede, serviços e sistemas operacionais existentes na rede.

Instalação


Nos sistemas GNU/Linux pode-se usar gerenciadores de pacotes que provavelmente o NMAP estará disponível. Para sistemas Debian basta seguir os comandos:

Será instalado o NMAP juntamente com as bibliotecas libpcap e liblua.

$ sudo apt-get install nmap -y

Utilizando o NMAP – Arquivo de Ajuda

Use o comando abaixo para listar o Help do NMAP.
$ nmap --help

Varredura Padrão


Lista se o host está ativo e em quais portas os serviços estão rodando. É possível fazer a varredura tanto pelo endereço IP quanto pelo nome do host, desde que nesse último caso, exista um DNS configurado.
$ nmap 172.18.56.12
Starting Nmap 6.25 ( http://nmap.org ) at 2015-02-05 17:20 Horario brasileiro de verão Nmap scan report for 172.18.56.12 Host is up (0.00068s latency). Not shown: 996 filtered ports PORT STATE SERVICE
21/tcp closed ftp
22/tcp open ssh
80/tcp open http
3128/tcp closed squid-http
MAC Address: 00:02:B3:D7:3A:36 (Intel)
Nmap done: 1 IP address (1 host up) scanned in 16.98 seconds

Lista de Alvos

Caso se tenha muitos alvos a pesquisar é possível criar uma lista com IP’s e host e armazenar em um arquivo.
# nmap -iL lista.txt

Descoberta de Alvos 

List scan (--sL). Faz varredura apenas listando os hosts ativos sem qualquer tipo de verificação de serviços.
# nmap -sL 192.168.1.0/24

O Ping (–PN) faz a busca sem opção de descoberta
# nmap -PN 10.0.0.0/24

aRP Ping (-PR)

# nmap -PR -sn 192.168.1.0/24 -oN saida.txt -PR arp request

-sn Não escaneia portas
-oN relatório é salvo em saida.txt

Descoberta Serviços


# nmap -p- -T4 -f -v -n -PO 192.168.1.0/24

-p- varre todas as 65535 portas
-T4 execução rápida
-f fragmenta pacotes (dificulta detecção e bloqueio) -v verbose -n Não resolve DNS (mais rápido) -PO Usa ping

Descoberta Mysql

# nmap -sT -sV -Pn -n -p 3306 192.168.1.0/24

-sT: TCP connect scan
-sV: Lista informações do serviço (banner)
-Pn: ignora descoberta
-p 3306: porta 3306 (padrão mysql – pode ter sido modificada) -n: não resolve DNS

Varredura por ICMP Echo Request (Ping)

# nmap -PE -sn 192.168.1.0/24
-PE ICMP echo request

Varredura por TCP SYN Ping

Recebe um pacote RST a partir de uma porta fechada e um pacote SYN/ACK a partir de uma porta aberta.
# nmap -PS -sn 192.168.1.0/24

-PS envia pacote TCP vazio com flag SYN para a porta 80
# nmap -PS443 -sn 172.18.70.0/24

-PS443 envia pacote TCP vazio com flag SYN para a porta 443
# nmap -PS80,443 -sn 172.18.70.0/24

-PS80,443 envia pacote TCP vazio com flag SYN para a porta 80,443

Varredura UDP Ping

Recebe ICMP port unreachable indicando que o host está ativo.
-PU40200 envia pacote UDP vazio para a porta 40100
# nmap -PU40100 -sn 172.18.70.0/24

-PU40200 envia pacote UDP vazio para as portas 40100 e 40110
# nmap -PU40100,40110 -sn 172.18.70.0/24

COMENTÁRIOS

Nome

.net Foundation,1,1. TheNewBoston,1,2048,1,32 bits,1,3CX Phone System,1,3D,5,4.8.5,1,4MLinux,5,4MLinux 20.0,1,4MLinux 21.0,1,4MParted,1,4MParted 20.0,1,4MRecover,2,64 bits,1,Aaron Swartz,1,Acessibilidade,3,Acesso Remoto,1,Administração,1,Adobe,2,Adobeair,2,Aegisub,1,Agenda,1,AI,1,AIDE,1,AirDroid,1,AKER,1,Alien,1,Alpha,1,alphaOS,1,Alpine Linux,1,ALT Linux,1,Alternativos,3,Amazon,1,AMD,5,Anatel,1,Android,50,Android 6.0,1,Android 6.0.1,1,Android 7.1,1,Android 7.1 Nougat,1,Android Marshmallow,1,Android Studio,2,Andromeda OS,1,AngryIPScanner,1,Antergos,2,Antivírus,3,Antivirus Live CD,1,antiX,1,Apache,2,Apachetop,1,Aplicativos,2,Apostilas,5,App Grid,1,Apple,8,Applet,4,Apport,1,Apps Android,2,ApricityOS,2,APT,5,Apt-Fast,1,Aptik,1,Arch Linux,37,Arch Linux 2016.11.01,1,Arch Linux 2016.12.01,1,ArchBang,1,Archey,1,ArchStrike,1,Arduíno,1,ArduPilot,1,armhf,1,Artes Gráficas,1,Artigo,16,Artigos,147,Assembly Language,1,Asterisk,1,Atheros,1,Atom,4,Atraci,1,Audacity,1,Audio Recorder,1,Aulas 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SempreUPdate: NMAP – Scanner de Segurança
NMAP – Scanner de Segurança
O NMAP é uma ferramenta de código aberto, utilizada para exploração de rede e auditoria de segurança. Ela foi desenvolvida para identificar as portas de serviço que estão abertas na máquina-alvo ou em um conjunto de máquinas.
https://4.bp.blogspot.com/-k7pArZSms6I/V9u_H8eBzcI/AAAAAAAAA1A/YImk7kua68AVcAJ_8KrqUftjPL104WKSwCEw/s640/namp.png
https://4.bp.blogspot.com/-k7pArZSms6I/V9u_H8eBzcI/AAAAAAAAA1A/YImk7kua68AVcAJ_8KrqUftjPL104WKSwCEw/s72-c/namp.png
SempreUPdate
http://www.sempreupdate.com.br/2016/09/nmap-scanner-de-seguranca.html
http://www.sempreupdate.com.br/
http://www.sempreupdate.com.br/
http://www.sempreupdate.com.br/2016/09/nmap-scanner-de-seguranca.html
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Carregar todas as postagens Não encontrado nenhum post VER TUDO Leia Mais Responder Cancelar Resposta Apagar Por Home PÁGINAS POSTAGENS Ver tudo RECOMENDADOS PARA VOCÊ MARCADOR ARQUIVO BUSCAR TODOS AS POSTAGENS Não encontramos nada com a palavra digitada Voltar para Home Domingo Segunda-feira Terça-feira Quarta-feira Quinta-feira Sexta-feira Sábado Dom Seg Ter Qua Qui Sex Sab Janeiro Fevereiro Março Abril Maio Junho Julho Agosto Setembro Outubro Novembro Dezembro Jan Fev Mar Abr Maio Jun Jul Ago Set Out Nov Dez Agora mesmo 1 minuto atrás $$1$$ minutes ago 1 hora atrás $$1$$ hours ago Ontem $$1$$ days ago $$1$$ weeks ago mais de 5 meses atrás Seguidores Seguir ESTE CONTEÚDO É PREMIUM Por favor, compartilhe para desbloquear Clique aqui para copiar o código Clique aqui para copiar o código Código copiado para área de transferência Não é possível copiar os códigos/textos, por favor pressione [CTRL] + [C] (ou CMD + C no Mac) para copiar